Gear shift



July 12, 1932. F. s. CARTWRIGHT 1,867,061

GEAR SHIFT Filed May 26, 1931 50 latch to hold theV opposite end downagainst Patented July 12, 1932 unirse srarss PATENT-lorries FOREST s.camaWRIGHT,r or INDIANAPOLIS, INDIANA, AssIGNoR 'ro ATWRIGIIT AUTOMATICGEAR SHIFT CORPORATION,

IIIION OF INDIANA OEINDIANAPOIIIS, INDIANA, nv coRPoRAT GEAR SHIFTApplication filed May 26, 1931. Serial 110.540,14.

This invention relates to automobile gear shifts and an object of theinvention is to provide means for preventing shifting accidentally intoreverse gear. f In certain types of automobile gear shift mechanism suchfor example as that shown in my recent Patent No. 1,771,431 there issome danger of throwing the gear into reverse When passing from low gearto intermediate, particularly if the transmission grease is 10W or isthin.

The purpose of the present invention is to Y provide locking means Whichmake it impossible to put the gears in reverse unless deliberatelyshifted to the reverse position.

Referring to the accompanying drawing, which is made a part hereof andon Which similar reference characters indicate similar parts,

Figure 1 is a plan view of a portion of the gear shifting housing Withmy inventionv adapted thereto, I Y

Figure 2, a section on lineQ-)l of Figure 1,

Figure 3, a section on line 3-5-3 of Figure 1,

Figure 4, a side elevation showing manually i operable means forshifting into reverse,rand

Figure 5, a detail vieW of the end of one of the gear shifting rods.

In the drawing numeral 9 indicates a housing in which gear shifting rods10 and 11 are 'side of the gear shift rod 11 is flattened asshoWn at'lllfor a short distance and is provided vvith a sharp shoulder 15. A latch16 is pivoted at l17 tothe housing 9. This latch has a beveled portion18 Which seats on the iat surface llpon the rod 1l. A spring 19 isseated in a depression in the housing 9 and bears against the under sideof the endof the the atsurface 414 on the rod 11. The flatrA surface 14v4permits the rod ,l'lfto move fore Ward to the low gear position butthe shoulder 15 engaging the latch 16 vlocksthislrodvagainst Y movementtothe rear to reverse gear position.`

The end of the latch Aieveifai ispivoted 22 to timeframe or ftheinaclnne'A and has ashortarm 23 which if A engages the beveledsurface 20 i to" rock the latchandmove-it out ofengagementfW- iththeshoulder 15. The lever 21is manually operatedfrom. the steering Wheel24-of the auto-l i mobile, the operating connection consisting of` 'i ya rod-'25 having 'a' suitable handle, 26I onjitsfi 5 upper end and aicrank 27- on its lower end. `"A I link 28 connects the crankf27 -Withthe'outer end of' theflever'Ql. The operator lof the the connection justdescribed Will rotate the lever0 21'on` its pivotfin` a clockwisedirection.

l:machinemay Akrock the 'rod 25' Vand through V The l arm 23""engaging,the beveled edge k2O j rocks the-latch 167m a clockwise directiontoi"lift it out of engagement 'vviththeslioulder 15:` Vhen-in this positionthe rod'll mayA be `free'ly"shifted to the right 'toreverse gearposition.: y I y ,y The end ofthe vrod 11` isbeveledat 2,9 so that 1tmaybe freely moved yf-romreverse to neutral position, the beveledendlifting the latch 16 tol permit it to moveto thisposition.

' It Will be 'seen from the construction so Y Y far described thatthelever 21 must be de? liberately, manually operatedbefore the'gear ishifting rod 1 1 positionf` -k I Y It Will be obvious to those skilledin the art that various changes may be made in my device vvithoutdeparting from the spirit of the invention and therefore I do not limitcan y movey Yto 4reve-rse gear' myself to what is shown in the drawingand described in the specification, but only as in'-` dicated by theappended claims.

I-Iaving thus fully describedmy said inc vention, what I. claim is newand desire to secure by Letters Patent, is:

1. In an automobile gear shift having a pair ofrods movable axially toposition automobilegears in low, reverse, intermediate and high gearpositions, one ofVV said. rods beingvnotched and beingl engageable by alatch for preventing its being accidentally removed to reverse gearposition, manually operable means for disengaging said latch to permitthe rod to be moved to reverse gear position, means on the steeringcolumn v of theautomobile foroperatingfvsaid latch,

. tobe and operable connection from said means to A n the said gearshifting rod releasing means, A substantially asset forthf 7 Y 2.-In an:mtomobile-gear-shifthavingaV ,pair of rods movable axially to position'automobile gears yin loW, reverse, intermediate or high gear positions,a latch engageable with one of said rods to prevent its bel ing moved inone direction-,.therod being notched to permit it vto move, freelyV inAthe" other direction( and manually operab means for' disengaging lsaidlatch to permit the rod moved in. either direction, substantial;

y lyasvset forth.lr

y3'. Inian automobile gear shil'twhavinga pair of rods movable axiallyto position automobile. gearsinl lovv,` reverse, intermef ,Y i, diate orhigh gear positions, a latch engage- Y yable .With one of saidl rods toprevent'its'bel ,l ing moved in one direction, -:the rod 4bein-g`notched to permit it to move freely .inthe OtheLdreCtion, and.:Vmanually operable meaaisfo-r disengaging said latch to .permit j the rodto rloe, moved Y inlelther'direction, Athe end of lsaid.notched :rodbeing beveled tof permititrto. slide freely under said latch and;nrestorethe latchto locking position', sub- Y Y y stantiallyasgsletrorth. Y j 1 y4'. InJan automobile gearshiftghaving a# Y pai-31'of rods movable axiallyto positionaute-l mobile gears'in lovv, reverse,vintermediate.4

and highi gear positions one of'saidrrodsbingnotchedand beingengageableby a; latch `for. l reventing itsl being accidently removed to t ereverse gear position, and manually operable .meansconnecte'd tothesteering. column of the automobile yfor disengaging said latchvto lpermitthe rod. 7'to be v moved Vto reverse gear position, substantiallyas set forth. In Witnessfwhereof, I have hereunto set my hand and sealat Indianapolis, Indiana., this 18th day of May, A. D;nineteen hundred Yand thirty-one FoREsT's.' CARTWRferry,7

